11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_UTILITIES_OSTREAM_HPP
26 #define SHARE_VM_UTILITIES_OSTREAM_HPP
27
28 #include "memory/allocation.hpp"
29 #include "runtime/timer.hpp"
30
31 class GCId;
32 DEBUG_ONLY(class ResourceMark;)
33
34 // Output streams for printing
35 //
36 // Printing guidelines:
37 // Where possible, please use tty->print() and tty->print_cr().
38 // For product mode VM warnings use warning() which internally uses tty.
39 // In places where tty is not initialized yet or too much overhead,
40 // we may use jio_printf:
41 // jio_fprintf(defaultStream::output_stream(), "Message");
42 // This allows for redirection via -XX:+DisplayVMOutputToStdout and
43 // -XX:+DisplayVMOutputToStderr
44 class outputStream : public ResourceObj {
45 protected:
46 int _indentation; // current indentation
47 int _width; // width of the page
48 int _position; // position on the current line
49 int _newlines; // number of '\n' output so far
50 julong _precount; // number of chars output, less _position
51 TimeStamp _stamp; // for time stamps
91 void print_raw_cr(const char* str, int len){ write(str, len); cr(); }
92 void print_data(void* data, size_t len, bool with_ascii);
93 void put(char ch);
94 void sp(int count = 1);
95 void cr();
96 void bol() { if (_position > 0) cr(); }
97
98 // Time stamp
99 TimeStamp& time_stamp() { return _stamp; }
100 void stamp();
101 void stamp(bool guard, const char* prefix, const char* suffix);
102 void stamp(bool guard) {
103 stamp(guard, "", ": ");
104 }
105 // Date stamp
106 void date_stamp(bool guard, const char* prefix, const char* suffix);
107 // A simplified call that includes a suffix of ": "
108 void date_stamp(bool guard) {
109 date_stamp(guard, "", ": ");
110 }
111 void gclog_stamp(const GCId& gc_id);
112
113 // portable printing of 64 bit integers
114 void print_jlong(jlong value);
115 void print_julong(julong value);
116
117 // flushing
118 virtual void flush() {}
119 virtual void write(const char* str, size_t len) = 0;
120 virtual void rotate_log(bool force, outputStream* out = NULL) {} // GC log rotation
121 virtual ~outputStream() {} // close properly on deletion
122
123 void dec_cr() { dec(); cr(); }
124 void inc_cr() { inc(); cr(); }
125 };
126
127 // standard output
128 // ANSI C++ name collision
129 extern outputStream* tty; // tty output
130 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty
131
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_UTILITIES_OSTREAM_HPP
26 #define SHARE_VM_UTILITIES_OSTREAM_HPP
27
28 #include "memory/allocation.hpp"
29 #include "runtime/timer.hpp"
30
31 DEBUG_ONLY(class ResourceMark;)
32
33 // Output streams for printing
34 //
35 // Printing guidelines:
36 // Where possible, please use tty->print() and tty->print_cr().
37 // For product mode VM warnings use warning() which internally uses tty.
38 // In places where tty is not initialized yet or too much overhead,
39 // we may use jio_printf:
40 // jio_fprintf(defaultStream::output_stream(), "Message");
41 // This allows for redirection via -XX:+DisplayVMOutputToStdout and
42 // -XX:+DisplayVMOutputToStderr
43 class outputStream : public ResourceObj {
44 protected:
45 int _indentation; // current indentation
46 int _width; // width of the page
47 int _position; // position on the current line
48 int _newlines; // number of '\n' output so far
49 julong _precount; // number of chars output, less _position
50 TimeStamp _stamp; // for time stamps
90 void print_raw_cr(const char* str, int len){ write(str, len); cr(); }
91 void print_data(void* data, size_t len, bool with_ascii);
92 void put(char ch);
93 void sp(int count = 1);
94 void cr();
95 void bol() { if (_position > 0) cr(); }
96
97 // Time stamp
98 TimeStamp& time_stamp() { return _stamp; }
99 void stamp();
100 void stamp(bool guard, const char* prefix, const char* suffix);
101 void stamp(bool guard) {
102 stamp(guard, "", ": ");
103 }
104 // Date stamp
105 void date_stamp(bool guard, const char* prefix, const char* suffix);
106 // A simplified call that includes a suffix of ": "
107 void date_stamp(bool guard) {
108 date_stamp(guard, "", ": ");
109 }
110 void gclog_stamp();
111
112 // portable printing of 64 bit integers
113 void print_jlong(jlong value);
114 void print_julong(julong value);
115
116 // flushing
117 virtual void flush() {}
118 virtual void write(const char* str, size_t len) = 0;
119 virtual void rotate_log(bool force, outputStream* out = NULL) {} // GC log rotation
120 virtual ~outputStream() {} // close properly on deletion
121
122 void dec_cr() { dec(); cr(); }
123 void inc_cr() { inc(); cr(); }
124 };
125
126 // standard output
127 // ANSI C++ name collision
128 extern outputStream* tty; // tty output
129 extern outputStream* gclog_or_tty; // stream for gc log if -Xloggc:<f>, or tty
130
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